build(deps): bump org.testcontainers:elasticsearch from 1.16.2 to 1.20.4

Bumps [org.testcontainers:elasticsearch](https://github.com/testcontainers/testcontainers-java) from 1.16.2 to 1.20.4.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.16.2...1.20.4)

---
updated-dependencies:
- dependency-name: org.testcontainers:elasticsearch
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -96,7 +96,7 @@
         <spock.version>2.3-groovy-3.0</spock.version>
         <stax-utils.version>20070216</stax-utils.version>
 
-        <testcontainers.elasticsearch.version>1.16.2</testcontainers.elasticsearch.version>
+        <testcontainers.elasticsearch.version>1.20.4</testcontainers.elasticsearch.version>
 
         <validation.version>3.0.2</validation.version>
         <velocity.version>2.3</velocity.version>